Home / 131,739.64-181,905.50-121,664.39

Finding the Fourth Proportional to 131,739.64, 181,905.50 and 121,664.39

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Solution

The fourth proportional to 131,739.64, 181,905.50 and 121,664.39 is: 167,993.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,739.64 : 181,905.50 = 121,664.39 : x
  2. Step 2: Convert to fraction form
    131,739.64/181,905.50 = 121,664.39/x
  3. Step 3: Cross multiply
    131,739.64x = 181,905.50 × 121,664.39
  4. Step 4: Simplify right side
    131,739.64x = 22,131,421,695.15
  5. Step 5: Solve for x
    x = 22,131,421,695.15/131,739.64
  6. Step 6: Final answer
    x = 167,993.64

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.